ZyXEL Communications P-660R-F1 series, Руководство пользователя

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Chapter 6 Network Address Translation (NAT) Screens
P-660R-F1 Series User’s Guide
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The following table describes the fields in this screen.
6.6 The SIP ALG Screen
Some NAT routers may include a SIP Application Layer Gateway (ALG). A SIP ALG allows SIP calls
to pass through NAT by examining and translating IP addresses embedded in the data stream.
When the ZyXEL Device registers with the SIP register server, the SIP ALG translates the ZyXEL
Device’s private IP address inside the SIP data stream to a public IP address. You do not need to
use STUN or an outbound proxy if your ZyXEL Device is behind a SIP ALG.
Use this screen to enable and disable the SIP (VoIP) ALG in the ZyXEL Device. To access this
screen, click
Network > NAT > ALG.
Figure 46
Network > NAT > ALG
Table 28
Port Forwarding Rule Setup
LABEL DESCRIPTION
Active Click this check box to enable the rule.
Service Name Enter a name to identify this port-forwarding rule.
Start Port Enter a port number in this field.
To forward only one port, enter the port number again in the End Port field.
To forward a series of ports, enter the start port number here and the end port
number in the
End Port field.
End Port Enter a port number in this field.
To forward only one port, enter the port number again in the Start Port field above
and then enter it again in this field.
To forward a series of ports, enter the last port number in a series that begins with
the port number in the
Start Port field above.
Server IP
Address Enter the inside IP address of the server here.
Back Click Back to return to the previous screen.
Apply Click Apply to save your changes back to the ZyXEL Device.
Cancel Click Cancel to begin configuring this screen afresh.